10-25m
    Ishigaki & Yaeyama, Japan
    名蔵アンパル

    Ukon Denchi

    Best months: Apr–Jun

    Protected Area

    名蔵アンパル

    Why dive here

    With 428+ marine species recorded in the area - including bull sharks, manta rays, mobula rays (devil rays), seahorses and sea turtles - Ukon Denchi offers some of Ishigaki & Yaeyama's richest reef diving. Water ranges 23-30°C, warmest July, August, September.

    Best timeApr–Jun
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBull Sharks, Manta Rays, Mobula Rays (Devil Rays), Seahorses and Sea Turtles · 428+ species recorded
    Water23-30°C · warmest July, August, September
    CharacterReef dive · max 10-25m
    StandoutExceptional marine biodiversity

    Ukon Denchi, near Ishigaki, holds a special place for us. It’s one of those sites where you can just drift and let the reef reveal itself. We’ve found it particularly good when the weather keeps you closer to shore, offering surprisingly sheltered conditions even on blustery days. Our favourite thing here has to be the sheer density of the staghorn coral. It forms these intricate, sprawling fields that stretch out under you, a proper maze for smaller fish. Look closely, and you’ll often spot lighthouse lizardfish perched on the tips, perfectly camouflaged. We’ve also had some fantastic encounters with common sandpipers foraging along the shallows near the entry point – a nice bonus before you even get your fins wet. The deeper sections around 15 metres hold some beautiful pavona and starflower corals, creating lovely pockets of colour. It’s a site that rewards a slow pace, letting you really soak in the details rather than rushing between big pelagic sightings. If you’re into macro life and intricate coral structures, this is a solid choice.

    Typical Ukon Denchi Dive Profile

    5m10mSafety Stop0m10m max~60 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Today05:4017:2211h 43m daylightGolden hour 16:52

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    Conditions

    Ocean conditions, forecast and tides for Ukon Denchi

    Ukon Denchi Ocean Conditions

    Monthly averages for Ukon Denchi, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (24.6, 124.35) (10km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    29°C

    84°F · Range: 27–30.4°C

    Air Temperature

    26°C

    79°F

    Wind Speed

    7.74 m/s

    15.0 knots

    Atmospheric Pressure

    1013.6 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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